APRIL 10, 1021 safford: synopsis of datura 177 



2. Datura ferox L. Amoen. Acad. 3: 403. 1764. 

 Type Locality: "Habitat in China." 



Kange: Warmer regions of China; introduced into Sicily and Spain. 



A weed growing in waste places, very similar to D. stramonmni, with the 

 pericarp bearing 4 very large stout spines at the apex. Called in vSpain 

 Esiramonio de la China. 



3. Datura quercifolia H. B. K. Nov. Gen. & Sp. 3: 7. 1818. 



Type Locality: "Cfescit locis temperatis Regni Mexicani prope Zelaya et 



Molino de Saravia, alt. 930 hex." 

 Range : Texas to Arizona and Mexico. 



A common weed along the banks of ditches. Leaves pinnately lobed; 

 pericarps armed with large rigid ascending spines. 



4. Datura villosa Fernald, Proc. Amer. Acad. 35: 571. 1900. 



Type Locality: Bolanos, Jalisco, Mexico. 



R.\nge: Jalisco and vSan Luis Potosi, Mexico, at altitudes of 1800 to 2500 

 meters. 



A weed growing in waste places, related to D. qtiercijolia, with which it has 

 been confused. 



Section II. Dutra Bernhardi. 



Flowers erect; corolla trumpet-shaped or funnel-shaped, the expanded limb 

 either 5-lobed or lo-angled; calyx-tube circumscissile, falling off with the 

 corolla, the persistent base at length expanding into a membranous frill or 

 cup, either reflexed or appressed to the fruit. Fruit (Fig. i, B, C, D) borne 

 on an inclined or nodding peduncle, not valvate but at length breaking open 

 irregularly, its surface tuberculate or spiny, the spines sometimes flexible and 

 not pungent, in some species pubescent. 



Type of the section, Datura metel L. 



KEY TO THE species 



Fruiting peduncle usually curved to one side, sometimes cernuous; pericarp 

 tuberculate or armed with short spines; plant glabrous or nearly so; 

 corolla white or colored, normally 5-lobed, in cultivation often double 

 or triple, the outer corolla 5-lobed or 6-lobed, the inner corollas 5-10- 

 lobed, the lobes separated by acute sinuses. — An Asiatic species including 

 several well-marked varieties. 5. D. metel. 



Fruiting peduncle abruptly nodding; pericarp armed with spines; plants 

 pubescent or pruinose; corolla white or tinged with lavender or purple, 

 the expanded limb lo-angled.^ — Plauts of American origin. 

 Flowers more than 6 cm. long. 



Corolla funnel-shaped, w^hite or tinged with purple or lavender; pericarp 

 armed with weak spines; seeds light brown. 

 Plant softly pubescent; corolla white, lo-toothed. 6. D. innoxia. 



Plant glaucescent; corolla usually suffused with pale lavender, 5- 

 toothed. 7. D. metel aides. 



Corolla trumpet-shaped with broadly flaring lo-toothed limb, white with 

 purple or violet throat; pericarp armed with stout spines; seeds black. 



8. D. discolor. 



Flowers not exceeding 6 cm. in length ; corolla w^hite ; pericarp armed with 

 short slender prickles, which together with the whole surface of the 

 capsule are finely pubescent. 9. D. pruinosa. 



